What caused the Tunguska explosion in 1908? This book examines the Tunguska Event, a massive explosion that occurred in Siberia in 1908, which flattened an estimated 2,000 square kilometers of forest. It discusses the initial theories, such as the impact of a meteorite or comet, and the more recent hypotheses, including the idea of a natural gas explosion or a UFO incident. The narrative explores the impact of the event on both local populations and scientific understanding, and examines the Russian government's initial suppression of information. By reviewing archival research, eyewitness accounts, and modern scientific analyses, the book seeks to shed light on one of the most significant unexplained events of the 20th century.